Method of making lock washers



y 1931- F. Q. SCHWARTZ 1 1,807,258

METHOD OF MAKING LOCK WASHERS Filed Feb. 25, 1929 INVENTOR flaw/V Q Sciw ry ATTO RN EYJ Patented May 26, 1931 i 1 UNITED STATES PATENT orrlca Application filed February 25, 1929. Serial No. 342,569.

This invention relates generally to lock verse edges 6, hence I have bent the struck washers and consists of certain novel features out tongues back across the plane of the anof construction, combinations and arrangenulus as illustrated in, Figure so that the ments of parts that will be hereinafter more sharp edges 7 produced by the punch and 5 fully described and particularly pointed out die will be exposed and in operative position in the appended claims. upon opposite sides of the annulus to engage In the accom anying drawirigsand bite into the opposed facesof the support Figure 1 is a ragmentary side elevation of 1 and nut 3 and thereby effectively prevent a support, bolt and nut, and showing a lock movement of the nut relative to the support.

10 washer embodying my invention applied In practice tongues such as 5 may be pressed thereto; from the washer at the outer edge thereof Figure 2 is a detail elevation of the look as lllustrated in Figure 3 or at the inner washer shown in Figurel; edge thereof as illustrated in Figure 6, or

Figure 3 is a plan view of the washer shown from the center of the washer as illustrated 151 in Figure 2; in Figure 8, or from the washer at both the Figure 4 is a fragmentary enlarged secinner and outer edges as illustrated in Figtion of a lock washer before the pressed out ure 7. In each instance, however, the tongues tongues are reversely bent; 5 are reversely bent so that the sharp edges Figure 5 is aview similar .to Figure 4 but 7 produced by the punches or dies are ex- 20 showing the tongues reversely bent; posed to engage the nut so that effective grip- Fi re 6 is a view similar to Figure 3 but ping action by the tongues'is obtained. showing a slightly modified construction; In use, when a washer such as 4 is clamped Figure 7 is a view similar to Figure 6 but between two bodies such as the support 1 showing another modification; and nut 3, the outer end portions 5 of the 25 Figure 8 is a view similar to Figure 7 tongues 5 will engage the opposed faces of showing still another modification. the support and nut, and due to their resil- Referring now to the drawing,-1 is a iency and formation will yield toward the support, 2 is a bolt, 3 is a nut, and 4 is a lock plane of the washer until the rounded inner washer embodying my invention. As shown end portions 5 of the tongues engage the so the lock washer4 surroundsthe shank ,of the said opposed faces of the support and nut, bolt between the support 1 and nut 3 and whereupon engagement of these parts will comprises an annulus 4', preferably of sheet tend to straighten out the tongues 5 and will metal, having reversely bent pressed out 'porthereby cause the sharp edges 7 already in tions or tongues 5 with successive tongues exengagement with the support and nut to bite 35 tending in opposite directions with respect further into these parts to effect a still tighter to the plane of the annulus and engaging the locking engagement therewith. upper face of the support and the lower face While it is believed that from the foregoing of the nut respectively. description the nature and advantages of the In the present instance the tongues 5 are invention will be readily apparent, I desire 40 struck out or pressed from the annulus 4 to have it understood that I do not limit as illustrated in Figure 4 by a suitable punch .myself to what is herein shown and described and cooperating die (not shown) successive and that such changes may be resorted to tongues being punched or pressed in oppowhen desired as fall within the scope of what site directions with respect to the annulus. 'is claimed. 1 45 In this connection I have found that the What I claim as my invention is: transverse edges 7 of the tongues extending 1. The method of forming lock washers at right angles to the direction of punch and having substantially L-shape tongues inproduced by the punch and die during this cluding the steps of pressing tongues in one pressing operation are relatively sharp, in direction from asubstantially fiat blank, and

5 fact much sharper than the opposite transbending the free end portions of said tongues in the opposite direction so that the tongues extend diagonally through openings formed by the pressing operation and so that edges of the tongues formed by the pressing o ration project laterally beyond the blanli for gripping engagement with a suitable surface.- The method of forming lock washers including the steps of pressing in one direc- Il tion from a substantially flat blank a substantially straight tongue having a free end, and then pressm the portion of the 'tongue in the opposite irection' past the plane ofthe body so that the free endaforesai'd will project laterally from one side of the blank, and a portionof the tongue at the inner end thereof will project laterally from the opposite side of the blank for engagement with another object.

3. The method of forming lock washers 6 including the steps of pressing in one direction from asubstantially flat blank a tongue having a free, end provided upon the side nearest the blank with a transversely extending edge disposed at substantially ri ht angles to the direction of pressing, and t en pressing a portion of the tongue in the opposite direction past the plane of the blank so that the free end aforesaid will project laterally from one side of the blank and thetransverse edge aforesaid will be farthest from the blank and will be exposed for locking engagement withanother object, and so that a portion of the tongue at its inner end will project laterally from the opposite side of" the blank for engagement ,.with another object In testimony whereof I afiix m si ature.

FRANK Q. SCHVT i 

